/Engine/Plugins/Animation/DeformerGraph/Source/OptimusCore/Public/OptimusExpressionEvaluator.h
Constants that begin with a number, include spaces or any of the above operands/parentheses are allowed, but must be then enclosed in single quotes when referenced. E.g: 'foo(1)' * 2 rather than: foo (1) * 2
namespace Optimus { namespace Expression { enum EParseFlags { Default = 0, ValidateConstants = 1 << 0, } } }